Language Codes Tools

Language code reference and tools: ISO 639-1 two-letter codes alongside ISO 639-2 three-letter codes, regional variants and fallback ordering, plus punycode.

语言代码 (Language Codes) is a frequently consulted reference for developers. Keeping the reference and ready-to-use tools on one page cuts the cost of switching back and forth. All tools below run locally, are free, and need no sign-up.

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